Tap for water or other liquids and fluids



March 2, 1937.

1.. DUMAS TAP FOR WATER OR OTHER LIQUIDS AND FLUIDS Filed March 11, 1955Patented Mar. 2, 1937 UNITED STATES PATENT OFFICE Louis Dumas, Geneva,Switzerland Application March 11, 1935, Serial No. 10,520 In SwitzerlandMarch 27, 1934 2 Claims.

This invention relates to improvements in taps for water or otherliquids and fluids.

The improved tap is constructed so as to supply cold water alone, or hotwater alone, or a mixture of both at varying degrees of temperature, orit can be used for supplying other liquids or fluids in like manner.

The annexed drawing illustrates an example of construction of theinvention.

Fig. 1 is an elevation of the improved tap.

Fig. 2 is a vertical section of Fig. 1, taken at a right angle thereto.

Fig. 3 is a plan View of Fig. I seen from above.

Figs. 4 and 5 illustrate individual parts of the tap in section.

Fig. 6 is a plan view of Fig. 5.

Fig. 7 is a top plan view, Fig. 8 a vertical section, and Fig. 9 abottom plan view, of a further individual part of the tap.

Fig. 10 is a vertical section of the same taken at a right angle to Fig.8.

Figs. 11 and 12 illustrate horizontal sections of Fig. 10 at Il-ll andI2-|2 respectively.

The tap illustrated in the drawing is composed 5 of a casing a (Figs. 1,2, 5) which is cylindrical outside and slightly conical inside, in whichthe conical plug b (Figs. 2, 8, 10) is rotatable.

The plug b is divided into two compartments by a wall B provided with anopening C at its centre, for the passage of the hot water, the entranceof the cold water is effected through the channel D which extendsthrough and terminates at the level of the opening C. The diameter ofthe channel D is reduced and its inlet opening restricted by beingformed of a series of perforations F as shown in Fig. 10 to reduce thepressure of the cold water supply.

Operation of the plug between the limits shown in Fig. 3 graduallycloses one of the water inlets while at the same time gradually openingthe other.

In the screw-threaded mouth e of the plug b is screwed the threadedportion of a guide-nut f having a flat part which forms a hermeticclosure.

A pin g secures the nut on the plug b while the nut f is integral withthe control knob h serving for turning the plug b in the casing a. Theplacing in position and the adjustment of these difierent members isobtained by tightening the closing cap 1' which is provided centrallywith an opening in which a shoulder of the nut f engages as shown inFig. 2, whereby the position of the nut ,f is maintained.

Extending axially through the nut f is a rod 1 20 part operated by thehandle m. At its lower end this rod is screw-threaded, so that it can bescrewed inwardly or outwardly of the nut f, and thereby displace a valveconsisting of a washer t, on a rod t which is attached to the rod Z by apin t which however allows the rod t to revolve on itself. In the top ofthe part f is screwed the packing nut o.

If the valve t is raised by means of the handle both the hot and thecold water pass into the upper compartment 0 of the plug and flowthrough the opening 8 which is elongated by 35 degrees so as to allowthe issue of the water whatever may be its position in respect to theopening u of the casing; the discharge tube 1) screws into the casing.

The outflow pressure will be stronger in proportion as the valve washert is raised higher.

In the water systems used in dwellings, the water enters through asingle cold water pipe which extends directly to the taps and otherappliances. A branch pipe is usually connected to the cold water pipeand leads to a water heater and storage vessel which ofier resistance tothe flow of water. Consequently, the pressure of the Water at thedischarge of the hot water branch is at a pressure lower than that ofthe water in the cold water pipe. As a result, at a point 01 use the hotwater is at pressure lower than that of the cold water.

According to the present invention the inlet a for the cold water isprovided with a grating A kept in place by a washer. This gratingrestricts the flow of cold water commensurate with the resistance of theheating system and operates to balance the pressure of the cold watersupply with respect to that of the hot water.

What I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. A tap for mixing hot and cold liquids suppliedby a system in which the hot liquid, due to resistance of heatingapparatus, has a discharge pressure lower than that of the cold liquid,comprising a casing, separate inlets in said casing for the two liquids,an outlet on said casing for the mixed liquids, a valve plug rotatablein said casing, said plug having a mixing chamber formed therein andports cooperating with said inlets to progressively close the inlet forone of the liquids while progressively opening the inlet for the otherliquid to admit the liquids to the mixing chamber, and a valve in saidmixing chamber operable independently of said plug for simultaneouslyregulating the flow of the liquids into the mixing chamber.

2. A mixing tap for liquids, comprising a casing, separate inlets forthe two liquids, an outlet for the mixed liquids, a valve plug rotatablein said casing to progressively close the inlet for one of the liquidswhile progressively opening the inlet for the other liquid, said plugbeing hollow and having an internal valve seat, a valve oper- LOUISDUMAS.

